參數(shù)資料
型號(hào)： XR16L2551
廠商： Exar Corporation
英文描述： LOW VOLTAGE DUART WITH POWERSAVE
中文描述： 低壓杜阿爾特與省電
文件頁數(shù)： 8/48頁
文件大?。?/td> 287K
代理商： XR16L2551
XR16L2551
LOW VOLTAGE DUART WITH POWERSAVE
á
REV. 1.0.0
8
2.0
FUNCTIONAL DESCRIPTIONS
2.1
The CPU interface is 8 data bits wide with 3 address lines and control signals to execute data bus read and
write transactions. The L2551 data interface supports the Intel compatible types of CPUs and it is compatible to
the industry standard 16C550 UART. No clock (oscillator nor external clock) is required to operate a data bus
transaction. Each bus cycle is asynchronous using CSA/B#, IOR# and IOW# or CS#, R/W# and A3 inputs.
Both UART channels share the same data bus for host operations. A typical data bus interconnection for Intel
and Motorola mode is shown in
Figure 3
.
CPU Interface
2.2
The L2551 can accept up to 5V inputs even when operating at 3.3V or 2.5V. But note that if the L2551 is
operating at 2.5V, its V
OH
may not be high enough to meet the requirements of the V
IH
of a CPU or a serial
transceiver that is operating at 5V.
5-Volt Tolerant Inputs
F
IGURE
3. XR16L2751 T
YPICAL
I
NTEL
/M
OTOROLA
D
ATA
B
US
I
NTERCONNECTIONS
2.25 to 5.5 Volt VCC
VCC
OP2A#
DSRA#
CDA#
CTSA#
RTSA#
DTRA#
RXA
TXA
RIA#
OP2B#
DSRB#
CDB#
CTSB#
RTSB#
DTRB#
RXB
TXB
RIB#
GND
A0
A1
A2
UART_CSA#
UART_CSB#
IOR#
IOW#
D0
A0
A1
A2
CSA#
CSB#
D0
D1
D2
D3
D4
D5
D6
D7
IOR#
IOW#
UART
Channel A
UART
Channel B
UART_INTB
UART_INTA
INTB
INTA
RXRDYA#
TXRDYB#
TXRDYA#
RXRDYA#
TXRDYB#
TXRDYA#
RXRDYB#
RXRDYB#
UART_RESET
RESET
RS-232 Serial Interface
Intel Data Bus Interconnections
(no connect)
(no connect)
RS-232 Serial Interface
2.25 to 5.5 Volt VCC
VCC
OP2A#
DSRA#
CDA#
CTSA#
RTSA#
DTRA#
RXA
TXA
RIA#
OP2B#
DSRB#
CDB#
CTSB#
RTSB#
DTRB#
RXB
TXB
RIB#
GND
A0
A1
A2
A3
UART_CS#
R/W#
D0
A0
A1
A2
CSB#
CSA#
D0
D1
D2
D3
D4
D5
D6
D7
IOR#
IOW#
UART
Channel A
UART
Channel B
UART_IRQ#
INTB
INTA
RXRDYA#
TXRDYB#
TXRDYA#
RXRDYA#
TXRDYB#
TXRDYA#
RXRDYB#
RXRDYB#
RESET#
RS-232 Serial Interface
RS-232 Serial Interface
Motorola Data Bus Interconnections
VCC
UART_RESET#
(no connect)
(no connect)
(no connect)
VCC
相關(guān)PDF資料
PDF描述
XR16L2551IL LOW VOLTAGE DUART WITH POWERSAVE
XR16L2551IM LOW VOLTAGE DUART WITH POWERSAVE
XR16L2552IJ 2.25V TO 5.5V DUART WITH 16-BYTE FIFO
XR16L2552IM 2.25V TO 5.5V DUART WITH 16-BYTE FIFO
XR16L2552 2.25V TO 5.5V DUART WITH 16-BYTE FIFO
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
XR16L2551_07 制造商:EXAR 制造商全稱:EXAR 功能描述:LOW VOLTAGE DUART WITH POWERSAVE
XR16L2551IL 功能描述:UART 接口集成電路 UART RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel
XR16L2551IL-0A-EB 功能描述:UART 接口集成電路 Supports L2551 32pin QFN, ISA Interface RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel
XR16L2551IL-0B-EB 功能描述:UART 接口集成電路 Supports L2551 32pin QFN, PCI Interface RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel
XR16L2551IL-F 功能描述:UART 接口集成電路 UART RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel
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